Tiiurs gustaf rennerfelt



t e e h S "P b e e h S 2 & U .T TM mm PP R Em N N Em R m T L E (No Model.)

Patented Nov. 26, 1895.

' INVENTOR ATTORNEY.

2 Sheets-Sheet 2.

(No Model.)

T. G. RENNERPELT. ELECTRIC PUMPING APPARATUS.

No. 550,330. Patented Nov. 26, 1-895.

. INVENTOH ATTORNEY.

AN DREW BJSRAHAM, PnoTou-mawAsm NGTONJ') C UNITED STATES PATENT OFFICE.

THURS GUSTAF RENNERFELT, OF NEIV YORK, N. Y.

ELECTRIC PUMPING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 550,330, dated November 26, 1895.

Application filed m a, 1895..

To all whom it may concern.-

Be it known that I, THURs GUsrAF RENNER- FELT, of the city of New York, in the State of New York, have invented a new and useful Improvement in Electric Pumping Apparatus, of which the following, taken in connection with the accompanying drawings, is a specification.

The present invention relates to improvements in apparatus of the above class; and it consists of the combi11ation,witl1 an electric motor,of a series of pumping-cylinders placed in and forming a part of the magnetic field of the motor, a series of pistons working in the pumping-cylinders, and connected mechanism driven by the motor for actuating the pistons. 1

The present invention further consists of the form and arrangement of the connecting mechanism above referred to, of a device for protecting the field-coil from water, and of the devices and combination of devices hereinafter more specifically set forth and claimed.

The object of the present invention is to in crease the efficiency and simplify the construction of apparatus of the above class.

The present invention is illustrated in the drawings herewith submitted, in which Figure 1 is a sectional view of an apparatus embodying the present invention taken on line y 3 Fig. 2. Fig. 2 is also a sectional view of same taken on line 00 as, Fig. 1. Fig. 3 is a sectional view showing amodified form of the present invention, taken on line y 3 Fig. 4;. Fig. 4 is a section on line :rw, Fig. 3.

Similar letters of reference refer to similar parts throughout the several views.

In the drawings, A represents the armature of the electric motor, B its commutator, and G the energizing field-coil, which, as shown, surrounds the magnet-core .or p0lepiece D. E represents the other pole-piece, around which a second field coil. may be placed; but I do not consider the same essential to the successful operation of the apparatus and have not deemed it necessary to illustrate the same in the drawings.

L represents a frame suitable to support the working parts of the motor, and which, as shown, forms a part of the magnetic circuit, being preferably formed in two sections or parts made integral with the respective polepieces and bolted or otherwise suitably secured to each other. The frame L, as shown, forms a water-tight easin g, which incloses the armature, commutator, and field-coil and protects the same from water and dust.

In practice I have provided for the shaft a the j ournal-boxes a a, which are formed upon removable plates (0 a which are fitted to the apertures a a in the frame L and suitably held in position. The apertures a a are so arranged that by removing either of plates a a the armature A may be removed through the same.

S S S represent a series of pumping-cylinders constructed of suitable magnetic material and placed in the magnetic field of the motor of which they form a part.

In Figs. 1 and 2 of the drawings the cylinders S S S are shown as united in a single casting, which is made integral with the polepieee I), and in the modified construction shown in Figs. 3 and 4: of the drawings, the cylinders S S S are shown as formed in a single casting which is bolted or otherwise suitably secured to the field-frame hereinbefore described, and in such manner that the magnetic lines of force shall have the benefit of the iron in the cylinder-casting. I desire to say in this connection that the object of the modified construction shown in Figs. 3 and 4 is to facilitate the construction of the magnetic frame and cylinder casting of different materials.

In practice I find it desirable to make the magnetic frame (including the pole-pieces) of cast-steel or wrought-iron, thereby securing certain well-known advantages. The cylinder-castin g may be of common cast-iron or any suitable magnetic material.

In the cylinders S S S work the plungers or pistons F F F, which are connected by the connecting-rods f f f with. the cranks G G G, which are formed on the crank-shaft G, the arrangement being such that a rotation of the crank shaft G produces a reciprocation of each of the plungers F F F.

The cranks G G G are conveniently placed at an angle of substantially one hundred and twenty degrees with each other to secure an. even operation of the apparatus and prevent pounding or vibration in the apparatus.

The shaft G maybe convenientlymounted in suitable bearings in the brackets g g, proj ected from the cylinder-casting.

In the form of my invention shown in Figs. 1 and 2 I have shown the crank-shaft G as driven by the motor by means of connecting mechanism consisting of a gear a, mounted on and rotating with the arm ature-shaf t a and in mesh with a gear 19, mounted upon a shaft I, supported in suitable bearings in the frame L and carrying at its opposite end a gear 19, which meshes with a gear g of the crankshaft G.

In the form of my invention shown in Figs. 3 and 4 of the drawings the gears 13 and p and the shaft]? are omitted; but such variation is immaterial, and other modifications of the connecting mechanism shown can be read ily made by one of average skill in the art without any departure from the essential features of the present invention.

T, T, and T represent water-passages, T being the delivery-passage, T the suctionpassage, and both of said passages communicating with the passage T, which communicates with the cylinder 8.

K represents the deliveryvalve, and II the suction-valve, which may be of any suitable form, further description whereof, in view of the prior art, being regarded as unnecessary herein.

In Figs. 3 and at I have shown a modified valve arrangement providing a double delivery-valve K K and a double suction-valve II II; but such variation is immaterial, and other variations can readily be made by one skilled in the art and involve no departure from the present invention.

An important feature of the present inven-- tion is the water-tight shield Z, which is proj ected over the field-coil c, and preferably over the armature and commutator of the motor, and protects the same from water. As shown, the shield Z forms a part of the frame L hereinbefore described; but it is evident that it might be readily otherwise arranged and used with good advantage in constructions having other forms of magnetic frames.

The operation of my improved pumping apparatus will be readily understood from the foregoing description of the form. and arrangement of the several parts. It is to be noted, however, that by the arrangement of the water-passages as shown I secure the cooling effect of the water as it enters and leaves all the cylinders in the magnetic field, which is of great advantage in apparatus of this class. It will also be noted that by arranging each piston to be actuated by connected mechanism common to all the pistons I avoid duplication of parts and greatly simplify the con struction.

I desire to say that I am aware of the state of the art as shown in Letters Patent of the United States issued to Van Depoele, No. et9t3,33 dated April 25, 1893, and No. 461,295, dated October 13, 1891, also Sprague, N 0. 372,821, dated November 8, 1887, also Buell,

No. 3443M, and I claim nothing shown or described therein.

I, however, do claim as my invention and desire to secure by Letters Patent of the United States- 1. The combination with an electric motor, of a series of pumping cylinders located in and forming a part of the field magnet, a piston working in each cylinder and connected mechanism driven by the motor and common to all the pistons for actuating each piston, substantially as described.

2. The combination with an electric motor of a series of pumping cylinders and water passages communicating therewith located in and forming a part of the field magnet, a piston working in each cylinder and connected mechanism driven by the motor for actuating the pistons, substantially as described.

3. In an electrical pumping apparatus, the combination with the associated parts of an electric motor, comprising a suitable field magnet, of a series of pumping cylinders formed of magnetic material and in magnetic connection with the field magnet, whereby the field of the magnet is strengthened. by the magnetic material in the cylinders, pistons in the cylinders, and means actuated by the motor for actuating the pistons, substantially as described.

4. The combination with an electric motor of a series of pumping cylinders located in and forming part of the field magnet, a piston working in each cylinder, a single crank shaft for actuating all the pistons and connected mechanism driven by the motor for actuating the crank shaft, substantially as described.

5. The combination with. associated parts of an electric motor, of a magnetic frame i11- closing the field coil and armature, a pumping cylinder in magnetic connection with the frame, a piston in the pumping cylinder and connected mechanism driven by the motor for actuating the piston, substantially as described. 6. The combination with an electric motor, of a series of pumping cylinders of magnetic material located above the motor and in magnetic connection with the field magnet a wateutight shield projecting over the field core of the motor, pistons in the cylinders, and means actuated by the motor for actuating the pistons, substantially as described.

7. The combination with associated parts of an electric motor of a suitable magnetic frame, a series of pumping cylinders formed in a single piece of magnetic material, and suitable connections with the magnetic frame of the motor whereby the field of the motor is strengthened by the magnetic material in the cylinders, pistons working in the cylinders and means actuated by the motor for actuating the pistons, substantially as described.

8; The combination with associated parts of an electric motor of a suitable magnetic frame, a series of pumping cylinders and water passages communicating therewith formed in a single piece of magnetic material, and suitable connections with the magnetic frame whereby the field 0f the motor is strengthened by the magnetic material in the cylinders and cooled by the passage of the water, pistons working in the cylinders, and means actuated by the motor for actuating the pistons, substantially as described.

In testimony whereof I have hereunto set my hand, in the presence of two Witnesses, it this 28th day of June, 1895.

THURS GUSTAF RENNERFELT. \Vitnesses:

S. GETZLER, M. WARD. 

